PCM2705CDBR | |
|---|---|
| Manufacturer Part Number | PCM2705CDBR |
| Description | IC DAC 16BIT STEREO W/USB 28SSOP |
| Manufacturer | Texas Instruments |
| Series | - |
| Type | DAC, USB |
| PCM2705CDBR datasheets |
|
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International delivery:
Warranty: 60 days
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Specifications of PCM2705CDBR | |||
|---|---|---|---|
| Applications | USB Audio | Mounting Type | * |
| Package / Case | * | Lead Free Status / Rohs Status | Lead free / RoHS Compliant |
| Other names | 296-29562-2 | ||
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Operating Environment
For current information on the PCM2704C/2705C/2706C/2707C operating environments, see the Updated
Operating Environments for PCM270X, PCM290X Applications application report, SLAA374, available through
the TI website at www.ti.com.
Typical Circuit Connection 1: USB Speaker
Figure 34
illustrates a typical circuit connection for an internal-descriptor, bus-powered, 500-mA application.
C
1
(3)
External ROM
(Optional)
SCL
SDA
R
9
S/PDIF OUT
R
USB ‘B’
2
Connector
R
3
D-
D+
V
BUS
C
3
GND
C
NOTE: X
: 12-MHz crystal resonator. C
, C
: 10-pF to 33-pF capacitors (depending on load capacitance of crystal resonator). C
1
1
2
ceramic capacitors. C
: 10-μF electrolytic capacitor. C
8
frequency response and discharge time for resume). C
resistor. R
, R
: 1.5-kΩ resistors. R
, R
: 22-Ω resistors. R
2
9
3
4
required THD performance and pop-noise level for suspend).
(1) Output impedance of V
L and V
R during suspended mode or lack of power supply is 26 kΩ ±20%, which is the discharge path for
OUT
OUT
C
and C
.
9
10
(2) Descriptor programming through external ROM is only available when PSEL and HOST are high.
(3) External ROM power can be supplied from V
source.
The circuit illustrated in
be considered to meet the USB specification as a USB-compliant product.
Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s):
EXAMPLE CIRCUITS
X
1
R
1
PCM2704CDB
XTI
28
1
XTO
2
CK
27
SSPND
3
DT
TEST0
26
(2)
4
TEST1
25
PSEL
5
HID2/MD
DOUT
24
6
HID1/MC
23
DGND
C
7
7
V
HID0/MS
22
DD
(2)
8
D-
HOST
21
R
4
(3)
9
D+
V
20
CCP
10
V
PGND
19
BUS
V
11
ZGND
18
COM
12
AGNDL
AGNDR
17
6
V
V
13
16
CCR
CCL
(1)
(1)
14
15
V
L
V
R
OUT
OUT
C
11
R
5
, C
: 100-μF electrolytic capacitors (depending on tradeoff between required
9
10
, C
: 0.022-μF ceramic capacitors. C
11
12
, R
: 16-Ω resistors. R
, R
: 330-Ω resistors (depending on tradeoff between
5
6
7
8
, but any other active component must not use V
CCP
Figure 34. Bus-Powered Application
NOTE
Figure 34
is for information only. The entire board design should
PCM2704C PCM2705C PCM2706C PCM2707C
PCM2704C, PCM2705C
PCM2706C, PCM2707C
SBFS036 – AUGUST 2011
C
2
SUSPEND
VOLUME-
VOLUME+
MUTE
C
4
C
+
8
C
5
C
C
9
13
+
+
+
+
C
C
C
12
TPA200x
10
14
Power Amp
R
R
R
6
7
8
to C
: 1-μF
3
7
, C
: 1-μF electrolytic capacitors. R
: 1-MΩ
13
14
1
, V
, V
, or V
as a power
CCP
CCL
CCR
DD
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29
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